Ah, absolutely no toes stepped on. I've never used Fandom myself, this was just what I could whip up real quick.
If you happen to use Fandom more often, maybe you'd like to publish this in Stylus? Even if it's just as a personal backup.
I mainly didn't do it, because without me using Fandom, the user style could be broken by tomorrow.
P.S.: I think, the first body > .main-container {-block can be removed, as you set the same style in the nested block underneath...